Carrie pitches Larissa a profile on New York wunderkind playwright Adam Weaver, but when he proves a difficult, yet fascinating, interview, Carrie’s job is on the line. Bennet’s rules in his relationship with Walt force Walt to acknowledge his real feelings. Carrie and Dorrit are surprised to find a common enemy in Tom’s girlfriend Deb’s son Dylan. Meanwhile, Sebastian seeks comfort in the arms of someone new.

When Sebastian learns that his mother is getting remarried, he asks for Carrie's dad to make sure she is legally protected. Carrie is furious when she discovers that Weaver has secretly read her journal. Mouse volunteers to help with the Homecoming float, but tries to distance herself when West wins Homecoming King. Samantha finds herself a place to live and another unusual job. Meanwhile, Dorrit begins to feel smothered by Miller, especially when he befriends her dad, and Donna LaDonna gives Dorrit some wise advice.

When Carrie struggles with writer’s block, Weaver tries to help but gets in the way. Maggie and Sebastian grow closer after learning some shocking news. When Bennet moves to a dangerous neighborhood, Walt takes drastic measures to keep himself safe, with both hilarious and heartfelt results. Meanwhile, Larissa and Samantha finally find some common ground: sex.

Carrie is shocked when she reads a nasty rumor about her in a New York City gossip rag, but Samantha has a plan to set the record straight. Walt steps in when Bennet feels taken advantage of at Interview. Mouse, worried that she and boyfriend West are stuck in a rut, does something very risqué. Meanwhile, when Maggie experiences a medical emergency, Sebastian is forced to reach out to the one person who can help.

Carrie, Mouse, Maggie, and Walt decide to go to their senior prom – at The Waldorf Astoria – together for a final hurrah. Larissa offers Carrie an opportunity that makes her rethink her plans for the next year. Mouse learns a secret about Donna LaDonna that could threaten her reign as queen bee. Meanwhile, Sebastian hides a big decision from Carrie.

Things grow increasingly tense between Carrie and Tom. When Larissa drops an unexpected bomb on Carrie, Sebastian decides he, too, needs to come clean about something. Maggie turns to Walt when she thinks Pete is cheating on her, but gets the surprise of her life. Mouse and West find themselves in a sticky situation. Elsewhere, Samantha considers leaving the city, and Larissa's wedding to Harlan is out of this world.